hoffa. >> there are many conspiracy theories on where hoffa is actually buries. some rumors include him being underneath giants stadium in new jersey or even on the grounds of the white house. >>> this morning we're getting video of a dramatic explosion in washington state. a truck burst into flames while it was laying down adhesive for lane markers. it was carrying a large propane tank. flames shoot out of all side of the truck. no one was hurt. >>> a record number of american households have student loan debt. a new report by the pew research foundation says one in five householdsing or 19%, are in student loan debt. that is up 15% from 2007. it's biggest three-year increase in student debt in more than 20 years. pew credits the increase to higher tuition costs and the reception. >> this morning, yosemite national park is the site of a giant science lab. a tourist was among three people who died from the hanta virus. nine people became infected. scientists are now screening employees at the california park and testing rodents to get a better idea how the diseas